[PATCH] sky2: power down PHY when not up

To save power, don't enable power to the PHY until device is brought up.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index eafb6327d68fbcb807d8bc67e37496144b04aa7d..c941195f0f4b6e7174dbf3607b65441ec4e75b63 100644 (file)
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -195,7 +195,6 @@ static u16 gm_phy_read(struct sky2_hw *hw, unsigned port, u16 reg)
 static void sky2_set_power_state(struct sky2_hw *hw, pci_power_t state)
 {
        u16 power_control;
-       u32 reg1;
        int vaux;
 
        pr_debug("sky2_set_power_state %d\n", state);
@@ -228,20 +227,9 @@ static void sky2_set_power_state(struct sky2_hw *hw, pci_power_t state)
                else
                        sky2_write8(hw, B2_Y2_CLK_GATE, 0);
 
-               /* Turn off phy power saving */
-               reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
-               reg1 &= ~(PCI_Y2_PHY1_POWD | PCI_Y2_PHY2_POWD);
-
-               /* looks like this XL is back asswards .. */
-               if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1) {
-                       reg1 |= PCI_Y2_PHY1_COMA;
-                       if (hw->ports > 1)
-                               reg1 |= PCI_Y2_PHY2_COMA;
-               }
-               sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
-               udelay(100);
-
                if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
+                       u32 reg1;
+
                        sky2_pci_write32(hw, PCI_DEV_REG3, 0);
                        reg1 = sky2_pci_read32(hw, PCI_DEV_REG4);
                        reg1 &= P_ASPM_CONTROL_MSK;
@@ -253,15 +241,6 @@ static void sky2_set_power_state(struct sky2_hw *hw, pci_power_t state)
 
        case PCI_D3hot:
        case PCI_D3cold:
-               /* Turn on phy power saving */
-               reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
-               if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1)
-                       reg1 &= ~(PCI_Y2_PHY1_POWD | PCI_Y2_PHY2_POWD);
-               else
-                       reg1 |= (PCI_Y2_PHY1_POWD | PCI_Y2_PHY2_POWD);
-               sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
-               udelay(100);
-
                if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1)
                        sky2_write8(hw, B2_Y2_CLK_GATE, 0);
                else
@@ -285,7 +264,7 @@ static void sky2_set_power_state(struct sky2_hw *hw, pci_power_t state)
        sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
 }
 
-static void sky2_phy_reset(struct sky2_hw *hw, unsigned port)
+static void sky2_gmac_reset(struct sky2_hw *hw, unsigned port)
 {
        u16 reg;
 
@@ -533,6 +512,28 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
                gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_DEF_MSK);
 }
 
+static void sky2_phy_power(struct sky2_hw *hw, unsigned port, int onoff)
+{
+       u32 reg1;
+       static const u32 phy_power[]
+               = { PCI_Y2_PHY1_POWD, PCI_Y2_PHY2_POWD };
+
+       /* looks like this XL is back asswards .. */
+       if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1)
+               onoff = !onoff;
+
+       reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
+
+       if (onoff)
+               /* Turn off phy power saving */
+               reg1 &= ~phy_power[port];
+       else
+               reg1 |= phy_power[port];
+
+       sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
+       udelay(100);
+}
+
 /* Force a renegotiation */
 static void sky2_phy_reinit(struct sky2_port *sky2)
 {
@@ -1088,6 +1089,8 @@ static int sky2_up(struct net_device *dev)
        if (!sky2->rx_ring)
                goto err_out;
 
+       sky2_phy_power(hw, port, 1);
+
        sky2_mac_init(hw, port);
 
        /* Determine available ram buffer space (in 4K blocks).
@@ -1421,7 +1424,7 @@ static int sky2_down(struct net_device *dev)
        /* Stop more packets from being queued */
        netif_stop_queue(dev);
 
-       sky2_phy_reset(hw, port);
+       sky2_gmac_reset(hw, port);
 
        /* Stop transmitter */
        sky2_write32(hw, Q_ADDR(txqaddr[port], Q_CSR), BMU_STOP);
@@ -1469,6 +1472,8 @@ static int sky2_down(struct net_device *dev)
        imask &= ~portirq_msk[port];
        sky2_write32(hw, B0_IMSK, imask);
 
+       sky2_phy_power(hw, port, 0);
+
        /* turn off LED's */
        sky2_write16(hw, B0_Y2LED, LED_STAT_OFF);
 
@@ -2403,7 +2408,7 @@ static int sky2_reset(struct sky2_hw *hw)
        sky2_write32(hw, B0_HWE_IMSK, Y2_HWE_ALL_MASK);
 
        for (i = 0; i < hw->ports; i++)
-               sky2_phy_reset(hw, i);
+               sky2_gmac_reset(hw, i);
 
        memset(hw->st_le, 0, STATUS_LE_BYTES);
        hw->st_idx = 0;